Portable heater



FIG. 1 is a perspective view taken from the top, front and left side ofa portable heater showing my new design, according to a firstembodiment;

FIG. 2 is a front side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view taken from the top, front and left side ofa portable heater showing my new design, according to a secondembodiment;

FIG. 8 is a front side view thereof;

FIG. 9 is a left side view thereof;

FIG. 10 is a rear view thereof;

FIG. 11 is a top view thereof; and,

FIG. 12 is a bottom view thereof.

The broken lines illustrate portions of the portable heater and form nopart of the claimed design.

CLAIM The ornamental design for portable heater, as shown and described.